#include"Mystdio.h"
#include<unistd.h>

#define myfile "test.txt"

int main()
{
	_FILE *fp=_fopen(myfile,"a");
	if(fp==NULL) return 1;
	
	const char *msg="hello world\n";
	int cnt=10;
	while(cnt)
	{
	_fwrite(fp,msg,strlen(msg));
	sleep(1);
	cnt--;
	}
	
	_fclose(fp);
	
	return 0;
}
